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Table 3 Dosimetric comparison of Standard IMRT plan, Sparing IMRT plan and VMAT planfor PTV 46 and 60 plans

From: Comparison of dose distributions hippocampus in high grade gliomas irradiation with linac-based imrt and volumetric arc therapy: a dosimetric study

  Standard IMRT plan Sparing IMRT plan VMAT plan p value
PTV46 max dose (Gy) 46.9 (46.2-47.4) 47 (46.5-47.6) 47.5 (48.5-50.1) 0.14
PTV46 mean dose (Gy) 48.9 (48-50.4) 49.3 (48.3-50.8) 48.5 (47.9-50.4) 0.21
D 95 46 (Gy) mean SD 46 (45.7-46.3) 46 (45.8-46.3) 46.4 (45.8-46.8) 0.55
PTV60 max dose (Gy) 63.2 (60.7-62.2) 63.4 (60.7-62.1) 63.6 (61.2-62.6) 0.44
PTV60 mean dose (Gy) 61 (61-64.3) 61.2 (62.4-64.9) 61.4 (61.3-64.6) 0.23
D 95 60 (Gy) 60 (59.7-60.2) 60 (59.9-60.3) 60 (59.9-61.5) 0.65
HI (60 Gy) 1.03 (1.02-1.05) 1.03 (1.02-1.04) 1.03 (1.02-1.04) 0.34
CI (60 Gy) 1.2 (1-1.4) 1.2 (1.1-1.6) 1.2 (0.9-1.6) 0.48
MU (0-60 Gy) 1472 (1041-1834) 1320 (1116-1993) 994 (886-1150) 0.01
Right lens max 4.8 (2.5-9.3) 5.2 (2.8-9.3) 7.5 (4.1-10.8) 0.1
Left lens max 7.7 (4.6-10.3) 6.1 (3.8-9.8) 4.0 (3.7-9.9) 0.001
Right eye mean 8.3 (4-25.8) 9.4 (5.1-16.7) 10.3 (3.6-17.6) 0.45
Left eye mean 10.8 (4.2-19.7 9.4 (6.2-16.2) 8.4 (5.9-16.3) 0.023
Right optic nerve max 35.1(29.2-41.0) 35.7 (30.6-40.8) 32.2 (25.2-39.1 0.65
Left optic nerve max 36.1 (30.2-42.1) 37.9 (32.4-43.5) 33.2 (25.6-40.8) 0.55
Optic chiasm max 39.8 (33.7-45.6) 43.2 (37.9-48.5) 37 (29.6-45.2) 0.7
Brainstem max 51.1 (48.2-54.3) 50.9 (48.3-54.5) 50.1 (48.9-54.1) 0.44